753 lines
27 KiB
C++
753 lines
27 KiB
C++
#include "./tagvalue.h"
|
|
#include "./tag.h"
|
|
|
|
#include "./id3/id3genres.h"
|
|
|
|
#include <c++utilities/conversion/binaryconversion.h>
|
|
#include <c++utilities/conversion/conversionexception.h>
|
|
#include <c++utilities/conversion/stringbuilder.h>
|
|
#include <c++utilities/conversion/stringconversion.h>
|
|
|
|
#include <algorithm>
|
|
#include <cstring>
|
|
#include <utility>
|
|
|
|
using namespace std;
|
|
using namespace ConversionUtilities;
|
|
using namespace ChronoUtilities;
|
|
|
|
namespace TagParser {
|
|
|
|
/*!
|
|
* \brief Returns the string representation of the specified \a dataType.
|
|
*/
|
|
const char *tagDataTypeString(TagDataType dataType)
|
|
{
|
|
switch (dataType) {
|
|
case TagDataType::Text:
|
|
return "text";
|
|
case TagDataType::Integer:
|
|
return "integer";
|
|
case TagDataType::PositionInSet:
|
|
return "position in set";
|
|
case TagDataType::StandardGenreIndex:
|
|
return "genre index";
|
|
case TagDataType::TimeSpan:
|
|
return "time span";
|
|
case TagDataType::DateTime:
|
|
return "date time";
|
|
case TagDataType::Picture:
|
|
return "picture";
|
|
case TagDataType::Binary:
|
|
return "binary";
|
|
default:
|
|
return "undefined";
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \class TagParser::TagValue
|
|
* \brief The TagValue class wraps values of different types. It is meant to be assigned to a tag field.
|
|
*
|
|
* For a list of supported types see TagParser::TagDataType.
|
|
*/
|
|
|
|
/*!
|
|
* \brief Constructs a new TagValue holding a copy of the given TagValue instance.
|
|
* \param other Specifies another TagValue instance.
|
|
*/
|
|
TagValue::TagValue(const TagValue &other)
|
|
: m_size(other.m_size)
|
|
, m_desc(other.m_desc)
|
|
, m_mimeType(other.m_mimeType)
|
|
, m_language(other.m_language)
|
|
, m_type(other.m_type)
|
|
, m_encoding(other.m_encoding)
|
|
, m_descEncoding(other.m_descEncoding)
|
|
, m_labeledAsReadonly(other.m_labeledAsReadonly)
|
|
{
|
|
if (!other.isEmpty()) {
|
|
m_ptr = make_unique<char[]>(m_size);
|
|
std::copy(other.m_ptr.get(), other.m_ptr.get() + other.m_size, m_ptr.get());
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Assigns the value of another TagValue to the current instance.
|
|
*/
|
|
TagValue &TagValue::operator=(const TagValue &other)
|
|
{
|
|
if (this == &other) {
|
|
return *this;
|
|
}
|
|
m_size = other.m_size;
|
|
m_type = other.m_type;
|
|
m_desc = other.m_desc;
|
|
m_mimeType = other.m_mimeType;
|
|
m_language = other.m_language;
|
|
m_labeledAsReadonly = other.m_labeledAsReadonly;
|
|
m_encoding = other.m_encoding;
|
|
m_descEncoding = other.m_descEncoding;
|
|
if (other.isEmpty()) {
|
|
m_ptr.reset();
|
|
} else {
|
|
m_ptr = make_unique<char[]>(m_size);
|
|
std::copy(other.m_ptr.get(), other.m_ptr.get() + other.m_size, m_ptr.get());
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns whether both instances are equal.
|
|
*
|
|
* If the data types are not equal, two instances are still considered equal if the string representation
|
|
* is identical. The encoding and meta data must be equal as well if relevant for the data type.
|
|
*
|
|
* \sa TagValueTests::testEqualityOperator()
|
|
*/
|
|
bool TagValue::operator==(const TagValue &other) const
|
|
{
|
|
// check whether meta-data is equal
|
|
if (m_desc != other.m_desc || (!m_desc.empty() && m_descEncoding != other.m_descEncoding) || m_mimeType != other.m_mimeType
|
|
|| m_language != other.m_language || m_labeledAsReadonly != other.m_labeledAsReadonly) {
|
|
return false;
|
|
}
|
|
|
|
// check for equality if both types are identical
|
|
if (m_type == other.m_type) {
|
|
switch (m_type) {
|
|
case TagDataType::Text:
|
|
if (m_size != other.m_size && m_encoding != other.m_encoding) {
|
|
// don't consider differently encoded text values equal
|
|
return false;
|
|
}
|
|
return strncmp(m_ptr.get(), other.m_ptr.get(), m_size) == 0;
|
|
case TagDataType::PositionInSet:
|
|
return toPositionInSet() == other.toPositionInSet();
|
|
case TagDataType::Integer:
|
|
return toInteger() == other.toInteger();
|
|
case TagDataType::StandardGenreIndex:
|
|
return toStandardGenreIndex() == other.toStandardGenreIndex();
|
|
case TagDataType::TimeSpan:
|
|
return toTimeSpan() == other.toTimeSpan();
|
|
case TagDataType::DateTime:
|
|
return toDateTime() == other.toDateTime();
|
|
case TagDataType::Picture:
|
|
case TagDataType::Binary:
|
|
case TagDataType::Undefined:
|
|
if (m_size != other.m_size) {
|
|
return false;
|
|
}
|
|
return strncmp(m_ptr.get(), other.m_ptr.get(), m_size) == 0;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// check for equality if types are different by comparing the string representation
|
|
try {
|
|
return toString() == other.toString(m_encoding);
|
|
} catch (const ConversionException &) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Wipes assigned meta data.
|
|
* - Clears description, mime type and language.
|
|
* - Resets the read-only flag to false.
|
|
* - Resets the encoding to TagTextEncoding::Latin1.
|
|
* - Resets the data type to TagDataType::Undefined.
|
|
*/
|
|
void TagValue::clearMetadata()
|
|
{
|
|
m_desc.clear();
|
|
m_mimeType.clear();
|
|
m_language.clear();
|
|
m_labeledAsReadonly = false;
|
|
m_encoding = TagTextEncoding::Latin1;
|
|
m_descEncoding = TagTextEncoding::Latin1;
|
|
m_type = TagDataType::Undefined;
|
|
}
|
|
|
|
/*!
|
|
* \brief Converts the value of the current TagValue object to its equivalent
|
|
* integer representation.
|
|
* \throws Throws ConversionException on failure.
|
|
*/
|
|
int32 TagValue::toInteger() const
|
|
{
|
|
if (isEmpty()) {
|
|
return 0;
|
|
}
|
|
switch (m_type) {
|
|
case TagDataType::Text:
|
|
switch (m_encoding) {
|
|
case TagTextEncoding::Unspecified:
|
|
case TagTextEncoding::Latin1:
|
|
case TagTextEncoding::Utf8:
|
|
return ConversionUtilities::bufferToNumber<int32>(m_ptr.get(), m_size);
|
|
case TagTextEncoding::Utf16LittleEndian:
|
|
case TagTextEncoding::Utf16BigEndian:
|
|
u16string u16str(reinterpret_cast<char16_t *>(m_ptr.get()), m_size / 2);
|
|
ensureHostByteOrder(u16str, m_encoding);
|
|
return ConversionUtilities::stringToNumber<int32>(u16str);
|
|
}
|
|
case TagDataType::Integer:
|
|
case TagDataType::PositionInSet:
|
|
case TagDataType::StandardGenreIndex:
|
|
if (m_size == sizeof(int32)) {
|
|
return *reinterpret_cast<int32 *>(m_ptr.get());
|
|
}
|
|
throw ConversionException("Can not convert assigned data to integer because the data size is not appropriate.");
|
|
default:
|
|
throw ConversionException(argsToString("Can not convert ", tagDataTypeString(m_type), " to integer."));
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Converts the value of the current TagValue object to its equivalent
|
|
* standard genre index.
|
|
* \throws Throws ConversionException on failure.
|
|
*/
|
|
int TagValue::toStandardGenreIndex() const
|
|
{
|
|
if (isEmpty()) {
|
|
return Id3Genres::emptyGenreIndex();
|
|
}
|
|
int index = 0;
|
|
switch (m_type) {
|
|
case TagDataType::Text: {
|
|
try {
|
|
index = toInteger();
|
|
} catch (const ConversionException &) {
|
|
TagTextEncoding encoding = TagTextEncoding::Utf8;
|
|
if (m_encoding == TagTextEncoding::Latin1) {
|
|
// no need to convert Latin-1 to UTF-8 (makes no difference in case of genre strings)
|
|
encoding = TagTextEncoding::Unspecified;
|
|
}
|
|
index = Id3Genres::indexFromString(toString(encoding));
|
|
}
|
|
break;
|
|
}
|
|
case TagDataType::StandardGenreIndex:
|
|
case TagDataType::Integer:
|
|
if (m_size != sizeof(int32)) {
|
|
throw ConversionException("The assigned index/integer is of unappropriate size.");
|
|
}
|
|
index = static_cast<int>(*reinterpret_cast<int32 *>(m_ptr.get()));
|
|
break;
|
|
default:
|
|
throw ConversionException(argsToString("Can not convert ", tagDataTypeString(m_type), " to genre index."));
|
|
}
|
|
if (!Id3Genres::isEmptyGenre(index) && !Id3Genres::isIndexSupported(index)) {
|
|
throw ConversionException("The assigned number is not a valid standard genre index.");
|
|
}
|
|
return index;
|
|
}
|
|
|
|
/*!
|
|
* \brief Converts the value of the current TagValue object to its equivalent
|
|
* PositionInSet representation.
|
|
* \throws Throws ConversionException on failure.
|
|
*/
|
|
PositionInSet TagValue::toPositionInSet() const
|
|
{
|
|
if (isEmpty()) {
|
|
return PositionInSet();
|
|
}
|
|
switch (m_type) {
|
|
case TagDataType::Text:
|
|
switch (m_encoding) {
|
|
case TagTextEncoding::Unspecified:
|
|
case TagTextEncoding::Latin1:
|
|
case TagTextEncoding::Utf8:
|
|
return PositionInSet(string(m_ptr.get(), m_size));
|
|
case TagTextEncoding::Utf16LittleEndian:
|
|
case TagTextEncoding::Utf16BigEndian:
|
|
u16string u16str(reinterpret_cast<char16_t *>(m_ptr.get()), m_size / 2);
|
|
ensureHostByteOrder(u16str, m_encoding);
|
|
return PositionInSet(u16str);
|
|
}
|
|
case TagDataType::Integer:
|
|
case TagDataType::PositionInSet:
|
|
switch (m_size) {
|
|
case sizeof(int32):
|
|
return PositionInSet(*(reinterpret_cast<int32 *>(m_ptr.get())));
|
|
case 2 * sizeof(int32):
|
|
return PositionInSet(*(reinterpret_cast<int32 *>(m_ptr.get())), *(reinterpret_cast<int32 *>(m_ptr.get() + sizeof(int32))));
|
|
default:
|
|
throw ConversionException("The size of the assigned data is not appropriate.");
|
|
}
|
|
default:
|
|
throw ConversionException(argsToString("Can not convert ", tagDataTypeString(m_type), " to position in set."));
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Converts the value of the current TagValue object to its equivalent
|
|
* TimeSpan representation.
|
|
* \throws Throws ConversionException on failure.
|
|
*/
|
|
TimeSpan TagValue::toTimeSpan() const
|
|
{
|
|
if (isEmpty()) {
|
|
return TimeSpan();
|
|
}
|
|
switch (m_type) {
|
|
case TagDataType::Text:
|
|
return TimeSpan::fromString(toString(m_encoding == TagTextEncoding::Utf8 ? TagTextEncoding::Utf8 : TagTextEncoding::Latin1));
|
|
case TagDataType::Integer:
|
|
case TagDataType::TimeSpan:
|
|
switch (m_size) {
|
|
case sizeof(int32):
|
|
return TimeSpan(*(reinterpret_cast<int32 *>(m_ptr.get())));
|
|
case sizeof(int64):
|
|
return TimeSpan(*(reinterpret_cast<int64 *>(m_ptr.get())));
|
|
default:
|
|
throw ConversionException("The size of the assigned integer is not appropriate for conversion to time span.");
|
|
}
|
|
default:
|
|
throw ConversionException(argsToString("Can not convert ", tagDataTypeString(m_type), " to time span."));
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Converts the value of the current TagValue object to its equivalent
|
|
* DateTime representation.
|
|
* \throws Throws ConversionException on failure.
|
|
*/
|
|
DateTime TagValue::toDateTime() const
|
|
{
|
|
if (isEmpty()) {
|
|
return DateTime();
|
|
}
|
|
switch (m_type) {
|
|
case TagDataType::Text:
|
|
return DateTime::fromString(toString(m_encoding == TagTextEncoding::Utf8 ? TagTextEncoding::Utf8 : TagTextEncoding::Latin1));
|
|
case TagDataType::Integer:
|
|
case TagDataType::DateTime:
|
|
if (m_size == sizeof(int32)) {
|
|
return DateTime(*(reinterpret_cast<uint32 *>(m_ptr.get())));
|
|
} else if (m_size == sizeof(int64)) {
|
|
return DateTime(*(reinterpret_cast<uint64 *>(m_ptr.get())));
|
|
} else {
|
|
throw ConversionException("The size of the assigned integer is not appropriate for conversion to date time.");
|
|
}
|
|
default:
|
|
throw ConversionException(argsToString("Can not convert ", tagDataTypeString(m_type), " to date time."));
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the encoding parameter (name of the character set and bytes per character) for the specified \a tagTextEncoding.
|
|
*/
|
|
pair<const char *, float> encodingParameter(TagTextEncoding tagTextEncoding)
|
|
{
|
|
switch (tagTextEncoding) {
|
|
case TagTextEncoding::Latin1:
|
|
return make_pair("ISO-8859-1", 1.0f);
|
|
case TagTextEncoding::Utf8:
|
|
return make_pair("UTF-8", 1.0f);
|
|
case TagTextEncoding::Utf16LittleEndian:
|
|
return make_pair("UTF-16LE", 2.0f);
|
|
case TagTextEncoding::Utf16BigEndian:
|
|
return make_pair("UTF-16BE", 2.0f);
|
|
default:
|
|
return make_pair(nullptr, 0.0f);
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Converts the currently assigned text value to the specified \a encoding.
|
|
* \throws Throws ConversionUtilities::ConversionException() if the conversion fails.
|
|
* \remarks
|
|
* - Does nothing if dataEncoding() equals \a encoding.
|
|
* - Sets dataEncoding() to the specified \a encoding if the conversion succeeds.
|
|
* - Does not do any conversion if the current type() is not TagDataType::Text.
|
|
* \sa convertDataEncodingForTag()
|
|
*/
|
|
void TagValue::convertDataEncoding(TagTextEncoding encoding)
|
|
{
|
|
if (m_encoding == encoding) {
|
|
return;
|
|
}
|
|
if (type() == TagDataType::Text) {
|
|
StringData encodedData;
|
|
switch (encoding) {
|
|
case TagTextEncoding::Utf8:
|
|
// use pre-defined methods when encoding to UTF-8
|
|
switch (dataEncoding()) {
|
|
case TagTextEncoding::Latin1:
|
|
encodedData = convertLatin1ToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
case TagTextEncoding::Utf16LittleEndian:
|
|
encodedData = convertUtf16LEToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
case TagTextEncoding::Utf16BigEndian:
|
|
encodedData = convertUtf16BEToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
default:;
|
|
}
|
|
break;
|
|
default: {
|
|
// otherwise, determine input and output parameter to use general covertString method
|
|
const auto inputParameter = encodingParameter(dataEncoding());
|
|
const auto outputParameter = encodingParameter(encoding);
|
|
encodedData
|
|
= convertString(inputParameter.first, outputParameter.first, m_ptr.get(), m_size, outputParameter.second / inputParameter.second);
|
|
}
|
|
}
|
|
// can't just move the encoded data because it needs to be deleted with free
|
|
m_ptr = make_unique<char[]>(m_size = encodedData.second);
|
|
copy(encodedData.first.get(), encodedData.first.get() + encodedData.second, m_ptr.get());
|
|
}
|
|
m_encoding = encoding;
|
|
}
|
|
|
|
/*!
|
|
* \brief Ensures the encoding of the currently assigned text value is supported by the specified \a tag.
|
|
* \sa This is a convenience method for convertDataEncoding().
|
|
*/
|
|
void TagValue::convertDataEncodingForTag(const Tag *tag)
|
|
{
|
|
if (type() == TagDataType::Text && !tag->canEncodingBeUsed(dataEncoding())) {
|
|
convertDataEncoding(tag->proposedTextEncoding());
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Converts the value of the current TagValue object to its equivalent
|
|
* std::string representation.
|
|
* \param result Specifies the string to store the result.
|
|
* \param encoding Specifies the encoding to to be used; set to TagTextEncoding::Unspecified to use the
|
|
* present encoding without any character set conversion.
|
|
* \remarks If UTF-16 is the desired output \a encoding, it makes sense to use the toWString() method instead.
|
|
* \throws Throws ConversionException on failure.
|
|
*/
|
|
void TagValue::toString(string &result, TagTextEncoding encoding) const
|
|
{
|
|
if (isEmpty()) {
|
|
result.clear();
|
|
return;
|
|
}
|
|
|
|
switch (m_type) {
|
|
case TagDataType::Text:
|
|
if (encoding == TagTextEncoding::Unspecified || dataEncoding() == TagTextEncoding::Unspecified || encoding == dataEncoding()) {
|
|
result.assign(m_ptr.get(), m_size);
|
|
} else {
|
|
StringData encodedData;
|
|
switch (encoding) {
|
|
case TagTextEncoding::Utf8:
|
|
// use pre-defined methods when encoding to UTF-8
|
|
switch (dataEncoding()) {
|
|
case TagTextEncoding::Latin1:
|
|
encodedData = convertLatin1ToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
case TagTextEncoding::Utf16LittleEndian:
|
|
encodedData = convertUtf16LEToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
case TagTextEncoding::Utf16BigEndian:
|
|
encodedData = convertUtf16BEToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
default:;
|
|
}
|
|
break;
|
|
default: {
|
|
// otherwise, determine input and output parameter to use general covertString method
|
|
const auto inputParameter = encodingParameter(dataEncoding());
|
|
const auto outputParameter = encodingParameter(encoding);
|
|
encodedData
|
|
= convertString(inputParameter.first, outputParameter.first, m_ptr.get(), m_size, outputParameter.second / inputParameter.second);
|
|
}
|
|
}
|
|
result.assign(encodedData.first.get(), encodedData.second);
|
|
}
|
|
return;
|
|
case TagDataType::Integer:
|
|
result = ConversionUtilities::numberToString(toInteger());
|
|
break;
|
|
case TagDataType::PositionInSet:
|
|
result = toPositionInSet().toString();
|
|
break;
|
|
case TagDataType::StandardGenreIndex: {
|
|
const auto genreIndex = toInteger();
|
|
if (Id3Genres::isEmptyGenre(genreIndex)) {
|
|
result.clear();
|
|
} else if (const char *genreName = Id3Genres::stringFromIndex(genreIndex)) {
|
|
result.assign(genreName);
|
|
} else {
|
|
throw ConversionException("No string representation for the assigned standard genre index available.");
|
|
}
|
|
break;
|
|
}
|
|
case TagDataType::TimeSpan:
|
|
result = toTimeSpan().toString();
|
|
break;
|
|
case TagDataType::DateTime:
|
|
result = toDateTime().toString();
|
|
break;
|
|
default:
|
|
throw ConversionException(argsToString("Can not convert ", tagDataTypeString(m_type), " to string."));
|
|
}
|
|
if (encoding == TagTextEncoding::Utf16LittleEndian || encoding == TagTextEncoding::Utf16BigEndian) {
|
|
auto encodedData = encoding == TagTextEncoding::Utf16LittleEndian ? convertUtf8ToUtf16LE(result.data(), result.size())
|
|
: convertUtf8ToUtf16BE(result.data(), result.size());
|
|
result.assign(encodedData.first.get(), encodedData.second);
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Converts the value of the current TagValue object to its equivalent
|
|
* std::u16string representation.
|
|
* \throws Throws ConversionException on failure.
|
|
* \remarks Use this only, if \a encoding is an UTF-16 encoding.
|
|
* \sa toString()
|
|
*/
|
|
void TagValue::toWString(std::u16string &result, TagTextEncoding encoding) const
|
|
{
|
|
if (isEmpty()) {
|
|
result.clear();
|
|
return;
|
|
}
|
|
|
|
string regularStrRes;
|
|
switch (m_type) {
|
|
case TagDataType::Text:
|
|
if (encoding == TagTextEncoding::Unspecified || encoding == dataEncoding()) {
|
|
result.assign(reinterpret_cast<const char16_t *>(m_ptr.get()), m_size / sizeof(char16_t));
|
|
} else {
|
|
StringData encodedData;
|
|
switch (encoding) {
|
|
case TagTextEncoding::Utf8:
|
|
// use pre-defined methods when encoding to UTF-8
|
|
switch (dataEncoding()) {
|
|
case TagTextEncoding::Latin1:
|
|
encodedData = convertLatin1ToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
case TagTextEncoding::Utf16LittleEndian:
|
|
encodedData = convertUtf16LEToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
case TagTextEncoding::Utf16BigEndian:
|
|
encodedData = convertUtf16BEToUtf8(m_ptr.get(), m_size);
|
|
break;
|
|
default:;
|
|
}
|
|
break;
|
|
default: {
|
|
// otherwise, determine input and output parameter to use general covertString method
|
|
const auto inputParameter = encodingParameter(dataEncoding());
|
|
const auto outputParameter = encodingParameter(encoding);
|
|
encodedData
|
|
= convertString(inputParameter.first, outputParameter.first, m_ptr.get(), m_size, outputParameter.second / inputParameter.second);
|
|
}
|
|
}
|
|
result.assign(reinterpret_cast<const char16_t *>(encodedData.first.get()), encodedData.second / sizeof(char16_t));
|
|
}
|
|
return;
|
|
case TagDataType::Integer:
|
|
regularStrRes = ConversionUtilities::numberToString(toInteger());
|
|
break;
|
|
case TagDataType::PositionInSet:
|
|
regularStrRes = toPositionInSet().toString();
|
|
break;
|
|
case TagDataType::StandardGenreIndex: {
|
|
const auto genreIndex = toInteger();
|
|
if (Id3Genres::isEmptyGenre(genreIndex)) {
|
|
regularStrRes.clear();
|
|
} else if (const char *genreName = Id3Genres::stringFromIndex(genreIndex)) {
|
|
regularStrRes.assign(genreName);
|
|
} else {
|
|
throw ConversionException("No string representation for the assigned standard genre index available.");
|
|
}
|
|
break;
|
|
}
|
|
case TagDataType::TimeSpan:
|
|
regularStrRes = toTimeSpan().toString();
|
|
break;
|
|
default:
|
|
throw ConversionException(argsToString("Can not convert ", tagDataTypeString(m_type), " to string."));
|
|
}
|
|
if (encoding == TagTextEncoding::Utf16LittleEndian || encoding == TagTextEncoding::Utf16BigEndian) {
|
|
auto encodedData = encoding == TagTextEncoding::Utf16LittleEndian ? convertUtf8ToUtf16LE(regularStrRes.data(), result.size())
|
|
: convertUtf8ToUtf16BE(regularStrRes.data(), result.size());
|
|
result.assign(reinterpret_cast<const char16_t *>(encodedData.first.get()), encodedData.second / sizeof(const char16_t));
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Assigns a copy of the given \a text.
|
|
* \param text Specifies the text to be assigned.
|
|
* \param textSize Specifies the size of \a text. (The actual number of bytes, not the number of characters.)
|
|
* \param textEncoding Specifies the encoding of the given \a text.
|
|
* \param convertTo Specifies the encoding to convert \a text to; set to TagTextEncoding::Unspecified to
|
|
* use \a textEncoding without any character set conversions.
|
|
* \throws Throws a ConversionException if the conversion the specified character set fails.
|
|
* \remarks Strips the BOM of the specified \a text.
|
|
*/
|
|
void TagValue::assignText(const char *text, std::size_t textSize, TagTextEncoding textEncoding, TagTextEncoding convertTo)
|
|
{
|
|
m_type = TagDataType::Text;
|
|
m_encoding = convertTo == TagTextEncoding::Unspecified ? textEncoding : convertTo;
|
|
|
|
stripBom(text, textSize, textEncoding);
|
|
if (!textSize) {
|
|
m_size = 0;
|
|
m_ptr.reset();
|
|
return;
|
|
}
|
|
|
|
if (convertTo == TagTextEncoding::Unspecified || textEncoding == convertTo) {
|
|
m_ptr = make_unique<char[]>(m_size = textSize);
|
|
copy(text, text + textSize, m_ptr.get());
|
|
return;
|
|
}
|
|
|
|
StringData encodedData;
|
|
switch (textEncoding) {
|
|
case TagTextEncoding::Utf8:
|
|
// use pre-defined methods when encoding to UTF-8
|
|
switch (convertTo) {
|
|
case TagTextEncoding::Latin1:
|
|
encodedData = convertUtf8ToLatin1(text, textSize);
|
|
break;
|
|
case TagTextEncoding::Utf16LittleEndian:
|
|
encodedData = convertUtf8ToUtf16LE(text, textSize);
|
|
break;
|
|
case TagTextEncoding::Utf16BigEndian:
|
|
encodedData = convertUtf8ToUtf16BE(text, textSize);
|
|
break;
|
|
default:;
|
|
}
|
|
break;
|
|
default: {
|
|
// otherwise, determine input and output parameter to use general covertString method
|
|
const auto inputParameter = encodingParameter(textEncoding);
|
|
const auto outputParameter = encodingParameter(convertTo);
|
|
encodedData = convertString(inputParameter.first, outputParameter.first, text, textSize, outputParameter.second / inputParameter.second);
|
|
}
|
|
}
|
|
// can't just move the encoded data because it needs to be deleted with free
|
|
m_ptr = make_unique<char[]>(m_size = encodedData.second);
|
|
copy(encodedData.first.get(), encodedData.first.get() + encodedData.second, m_ptr.get());
|
|
}
|
|
|
|
/*!
|
|
* \brief Assigns the given integer \a value.
|
|
* \param value Specifies the integer to be assigned.
|
|
*/
|
|
void TagValue::assignInteger(int value)
|
|
{
|
|
m_size = sizeof(value);
|
|
m_ptr = make_unique<char[]>(m_size);
|
|
std::copy(reinterpret_cast<const char *>(&value), reinterpret_cast<const char *>(&value) + m_size, m_ptr.get());
|
|
m_type = TagDataType::Integer;
|
|
m_encoding = TagTextEncoding::Latin1;
|
|
}
|
|
|
|
/*!
|
|
* \brief Assigns a copy of the given \a data.
|
|
* \param data Specifies the data to be assigned.
|
|
* \param length Specifies the length of the data.
|
|
* \param type Specifies the type of the data as TagDataType.
|
|
* \param encoding Specifies the encoding of the data as TagTextEncoding. The
|
|
* encoding will only be considered if a text is assigned.
|
|
*/
|
|
void TagValue::assignData(const char *data, size_t length, TagDataType type, TagTextEncoding encoding)
|
|
{
|
|
if (type == TagDataType::Text) {
|
|
stripBom(data, length, encoding);
|
|
}
|
|
if (length > m_size) {
|
|
m_ptr = make_unique<char[]>(length);
|
|
}
|
|
if (length) {
|
|
std::copy(data, data + length, m_ptr.get());
|
|
} else {
|
|
m_ptr.reset();
|
|
}
|
|
m_size = length;
|
|
m_type = type;
|
|
m_encoding = encoding;
|
|
}
|
|
|
|
/*!
|
|
* \brief Assigns the given \a data. Takes ownership.
|
|
*
|
|
* The specified data is not copied. It is moved.
|
|
*
|
|
* \param data Specifies the data to be assigned.
|
|
* \param length Specifies the length of the data.
|
|
* \param type Specifies the type of the data as TagDataType.
|
|
* \param encoding Specifies the encoding of the data as TagTextEncoding. The
|
|
* encoding will only be considered if a text is assigned.
|
|
* \remarks Does not strip the BOM so for consistency the caller must ensure there is no BOM present.
|
|
*/
|
|
void TagValue::assignData(unique_ptr<char[]> &&data, size_t length, TagDataType type, TagTextEncoding encoding)
|
|
{
|
|
m_size = length;
|
|
m_type = type;
|
|
m_encoding = encoding;
|
|
m_ptr = move(data);
|
|
}
|
|
|
|
/*!
|
|
* \brief Strips the byte order mask from the specified \a text.
|
|
*/
|
|
void TagValue::stripBom(const char *&text, size_t &length, TagTextEncoding encoding)
|
|
{
|
|
switch (encoding) {
|
|
case TagTextEncoding::Utf8:
|
|
if ((length >= 3) && (ConversionUtilities::BE::toUInt24(text) == 0x00EFBBBF)) {
|
|
text += 3;
|
|
length -= 3;
|
|
}
|
|
break;
|
|
case TagTextEncoding::Utf16LittleEndian:
|
|
if ((length >= 2) && (ConversionUtilities::LE::toUInt16(text) == 0xFEFF)) {
|
|
text += 2;
|
|
length -= 2;
|
|
}
|
|
break;
|
|
case TagTextEncoding::Utf16BigEndian:
|
|
if ((length >= 2) && (ConversionUtilities::BE::toUInt16(text) == 0xFEFF)) {
|
|
text += 2;
|
|
length -= 2;
|
|
}
|
|
break;
|
|
default:;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Ensures the byte-order of the specified UTF-16 string matches the byte-order of the machine.
|
|
* \remarks Does nothing if \a currentEncoding already matches the byte-order of the machine.
|
|
*/
|
|
void TagValue::ensureHostByteOrder(u16string &u16str, TagTextEncoding currentEncoding)
|
|
{
|
|
if (currentEncoding !=
|
|
#if defined(CONVERSION_UTILITIES_BYTE_ORDER_LITTLE_ENDIAN)
|
|
TagTextEncoding::Utf16LittleEndian
|
|
#elif defined(CONVERSION_UTILITIES_BYTE_ORDER_BIG_ENDIAN)
|
|
TagTextEncoding::Utf16BigEndian
|
|
#else
|
|
#error "Host byte order not supported"
|
|
#endif
|
|
) {
|
|
for (auto &c : u16str) {
|
|
c = swapOrder(static_cast<uint16>(c));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns an empty TagValue.
|
|
*/
|
|
const TagValue &TagValue::empty()
|
|
{
|
|
static TagValue emptyTagValue;
|
|
return emptyTagValue;
|
|
}
|
|
|
|
} // namespace TagParser
|